Sprouts processed by Bridgeport-based Amalgamated Produce Inc. have been recalled after a sample collected from a supermarket in New York tested positive for an organism that can cause serious infections.

The sprouts also were sold at Stop & Shop, ShopRite and Price Chopper stores in Connecticut.

Consumer Protection Commissioner Jerry Farrell Jr. said Thursday that the recalled sprouts tested positive for Listeria monocytogenes, an organism that can cause serious and sometimes fatal infections in young children or in frail or elderly people.

No illnesses had been reported in Connecticut as of Thursday, but Amalgamated Produce is recalling its sprouts. Sprouts under various brand names with a "sell by" date of March 31 through April 27, weighing 4 ounces and packaged in plastic containers, have been recalled.

Listeria infections can result in high fever, severe headaches, stiffness, nausea, abdominal pain and diarrhea, Farrell said. An infection can also cause miscarriages and stillbirths in pregnant women.

Farrell said stores across the Northeast that have received shipments of the sprouts are being directed to remove them from shelves immediately.

State consumer protection inspectors and the federal Food and Drug Administration are working with the manufacturer to determine the source of the contamination.

Consumers with sprouts from this company should discard the product or return it to the place of purchase for a refund, Farrell said.